Rotax Crankcase Balance Shaft

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Balance Shaft for Rotax FR125 Max Evo kart engine. Ideal for dampening vibrations within crankcase and engine during operation, this component is denoted by P/N 237948 on the parts diagram shown in the image gallery. 

Note in the image how this component features a splined gear end, as well as a burnished / polished bearing point - the balance shaft fits within the splines of the steel balance gear (50T) during crankcase assembly. 

Each balance shaft is sold separately, and must be installed (unless you do not intend to race) by an authorized Rotax service technician.